IGCSE Chemistry Practice Questions - Cambridge IGCSE Chemistry (0620) Exam

Two gases, hydrogen (Mr = 2) and oxygen (Mr = 32), are released at the same point. Which statement is correct?

Oxygen diffuses faster than hydrogen because it is heavier Hydrogen diffuses faster than oxygen because lighter particles move faster at the same temperature Both diffuse at the same rate because the temperature is identical Neither gas diffuses at room temperature

Correct Answer:

Hydrogen diffuses faster than oxygen because lighter particles move faster at the same temperature

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